GeForce GTX 980 vs Radeon RX 6800 XT

Intro

Compare those specifications to the Radeon RX 6800 XT, which makes use of a 7 nm design. AMD has clocked the core frequency at 1825 MHz. The GDDR6 memory runs at a frequency of 2000 MHz on this specific model. It features 4608 SPUs along with 288 Texture Address Units and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980		165 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 135 Watts (82%)

Memory Bandwidth

The Radeon RX 6800 XT, in theory, should be much faster than the GeForce GTX 980 overall. (explain)

Radeon RX 6800 XT		524288 MB/sec
GeForce GTX 980		224000 MB/sec
	Difference: 300288 (134%)

Texel Rate

The Radeon RX 6800 XT will be a lot (more or less 265%) more effective at anisotropic filtering than the GeForce GTX 980. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
GeForce GTX 980		144128 Mtexels/sec
	Difference: 381472 (265%)

Pixel Rate

The Radeon RX 6800 XT should be a lot (more or less 224%) more effective at anti-aliasing than the GeForce GTX 980, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
GeForce GTX 980		72064 Mpixels/sec
	Difference: 161536 (224%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.